In the TV show metalocalypse the bassist would literally rock out with his cock out, even going as far as playing with his cock.
2. the outgoing governor of Florida worked feverishly to give a pardon to Doors frontman Jim Morrison for rocking out with his cock out during a gig sometime during 1969 - 1971. The pardon was granted.
3. On the track "Rock Out" on the 2008 Motorhead CD "Motorizer" Lemmy exhorts you to impress your lady friends by rocking out with your cock out.
4. Trent got busted by the cops when he flashed his weenie at every neighbor who was home. He said to each of them, "This spud's for you" and walked on by. Not everybody wants you to rock out with your cock out.